Continuity mistake: From the inside view of the window the Hendricks gravestone and the family name is visible on it. From the outside view of the window the gravestone and the Hendricks are facing away from the window.
Continuity mistake: When the ship's captain is questioning the survivor, the man is sitting up with the iron bedstead behind him. When the shot cuts, he's suddenly lying flat with his head on the pillow.
Continuity mistake: After she leaves the sanitarium, Elaine's long blonde hair is blowing wildly in the wind as she drives. In the next shot, with no time for her to have combed it, her hair is neatly coiffed again.